But love is the devil, and the devil is fickle. This is the extraordinary tale of an extraordinary man.

In a country and an age when poets were stars, Yesenin was revered by millions.

Schoolchildren learned his verses by heart. Adolescent girls copied them in their diaries. Red Army soldiers carried them in their uniforms as they went into battle.

Yuri Gagarin took them into space. Yesenin's fame brought him meetings with the Tsar's wife and daughters and with Rasputin before the Revolution; with Trotsky and Kamenev, and a stormy marriage to the world's most famous dancer, Isadora Duncan, after it.

Like the fictional Yuri Zhivago, he survived the turmoil of war and revolution and lived a personal life of comparable drama.

Visit his grave in Moscow and you will find tramps waiting to recite his poetry.

They expect a little vodka money, but they too love this tender, troubled man, dead now for nearly a hundred years. Bursting with the real-life drama of love in turbulent times, An Unquiet Heart is a magnificently wrought novel of passion and violence, triumph and tragedy.